
known as the subordinate theory [1]}, [2]}, [3]}. For our purpose, we will use the subordinate theory [4]} for the following matrix-valued Jacobi operators,
\((J{u})(n)=D_{n-1}{u}(n-1)+D_n {u}(n+1)+V_n{u}(n),\ \ n\in \mathbb {Z},\) 
